5-lipoxygenase (5-LO) pathway metabolite 5(S)-hydrooxyeicosa-6E,8C,11Z,14Z-tetraenoic acid (5-HETE) has a growth stimulatory action on breast cancer cells whereas selective reduction in the levels of 5-HETE but not cyclooxygenase inhibitors reduced growth, increased apoptosis, down-regulated bcl-2, up-regulated bax, and increased G1 arrest. The gene discussed is BCL2; the disease is breast carcinoma.